feat(string_utils): insert_into

tests/unit/utils/insert_into.c

@@ -0,0 +1,85 @@
+#define _POSIX_C_SOURCE 200809L
+#include <criterion/criterion.h>
+#include <criterion/new/assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../../../src/utils/string_utils/string_utils.h"
+
+TestSuite(insert_into);
+
+Test(insert_into, basic)
+{
+    char *dest = strdup("The <WORD> is nice.");
+    const char *src = "weather";
+    size_t pos = 4;
+
+    char *result = insert_into(dest, src, pos, 6);
+
+    cr_expect(result != NULL);
+    cr_expect(eq(str, result, "The weather is nice."));
+
+    if (result)
+        free(result);
+}
+
+Test(insert_into, begin)
+{
+    char *dest = strdup("Hello World!");
+    const char *src = "Hi";
+    size_t pos = 0;
+
+    char *result = insert_into(dest, src, pos, 5);
+
+    cr_expect(result != NULL);
+    cr_expect(eq(str, result, "Hi World!"));
+
+    if (result)
+        free(result);
+}
+
+Test(insert_into, end)
+{
+    char *dest = strdup("The number is 1024");
+    const char *src = "2048";
+    size_t pos = 14;
+
+    char *result = insert_into(dest, src, pos, 4);
+
+    cr_expect(result != NULL);
+    cr_expect(eq(str, result, "The number is 2048"));
+
+    if (result)
+        free(result);
+}
+
+Test(insert_into, big)
+{
+    char *dest = strdup("I could insert [VAR] here.");
+    const char *src = "a very very long string";
+    size_t pos = 15;
+
+    char *result = insert_into(dest, src, pos, 5);
+
+    cr_expect(result != NULL);
+    cr_expect(eq(str, result, "I could insert a very very long string here."));
+
+    if (result)
+        free(result);
+}
+
+Test(insert_into, small)
+{
+    char *dest = strdup("I could insert [VARNAME_IS_SO_LONG] string here.");
+    const char *src = "a short";
+    size_t pos = 15;
+
+    char *result = insert_into(dest, src, pos, 20);
+
+    cr_expect(result != NULL);
+    cr_expect(eq(str, result, "I could insert a short string here."));
+
+    if (result)
+        free(result);
+}